TREATMENT OF LATICES

The amt. of residual monomer in a polymer latex, partic. vinyl chloride in PVC, is reduced by atomising the latex, obtained by emulsion of microsuspension polymerisation, in a closed vessel where the press. is such that the b.pt. of water there is pref. 60-80 degrees C, using a current of water vapo...

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Bibliographische Detailangaben
1. Verfasser:	JARMAN L H W
Format:	Patent
Sprache:	swe
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY NOZZLES ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING
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Beschreibung
Zusammenfassung:	The amt. of residual monomer in a polymer latex, partic. vinyl chloride in PVC, is reduced by atomising the latex, obtained by emulsion of microsuspension polymerisation, in a closed vessel where the press. is such that the b.pt. of water there is pref. 60-80 degrees C, using a current of water vapour of temp. pref. >b.pt. of water in the vessel, e.g. 60-200, pref. 100-180 degrees C. The gas contg. monomer is drawn off and the latex is collected and removed. The process removes residual monomer from the polymer latex without destroying the latex or adversely affecting its properties, without an accumulation of polymer deposits, and the residual monomer can be readily recovered.